A source tells us that Apple’s UK iPhone PR team is approaching journalists from major publications to fly out to the event in San Francisco next month. The obvious conclusion would be that Apple is announcing a new iPhone. Or rather, an updated model. The iPhone 4S is slated as a stop-gap before the appearance of a true, ‘&%!*, they’ve done it again!’ game-changer next year.

Meanwhile, the Australian-based iTechReport eyed a tweet (since removed) from Australian technology journalist Charlie Brown indicating that he was off to WWDC at Apple’s behest.

With Apple reaching out to journalists abroad, one has to wonder what WWDC has in store. Apple typically restricts its invites to the domestic media unless it has a big announcement up its sleeve, but with no hardware on the agenda, what’s going on here?

Could, perhaps, a stop-gap iPhone 4S be announced? Possibly, but not probable. Besides, a stop-gap iPhone is hardly an announcement that would warrant international press.

The only logical conclusion is that the features in iOS 5 will be so incredible as to justify inviting the foreign press. Again, Apple hasn’t let the iOS 5 cat out of the bag just yet, but be prepared for some heavy location-based features along with rumors of deep voice integration courtesy of Nuance. Still, as intriguing as those features are, expect a “one more thing” moment given the push to get foreign press into the pearly gates of the Moscone Center in early June.

Lastly, there’s still no word whether or not Steve Jobs will be delivering the event’s keynote speech.